Nickel Alloy 825 / UNS N08825

Alloy 825


Applications Alloy 825:

Alloy 825 is a nickel-iron-chromium alloy with molybdenum and copper added to it. It has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking and to localized attack such as pitting and crevice corrosion. The alloy is especially resistant to sulfuric and phosphoric acids. Used for chemical processing, pollution-control equipment, oil and gas well piping, nuclear fuel reprocessing, acid production and pickling equipment.

Chemical analysis Alloy 825:
Nickel – 38,0-46,0%
Chromium – 19,5-23,5%
Iron – 22.0%
Molybdenum 2,5-3,5%
Copper – 1,5-3,0%
Manganese –  1,0% max.
Carbon – 0,05% max.
Silicon – 0,5% max.
Sulfur –  0,03% max.
Aluminium: 0,2% max.

Alloy 825 ASTM standards:
Bar/Billet – B425
Forgings/Flanges – B564
Seamless Tubing –  B163
Welded Tubing –  B704
Seamless Pipe – B423
Welded Pipe – B705
Plate – B424
Buttweld fittings – B366

Density Alloy 825: 8,18